UBC applies to sales between private parties.That doesn't make sense.Universal background checks cannot be effective w/o universal gun regustration.
That, of course, is the plan...
Why does a background check not work unless there is registration?
Checks for criminal history and flags on mental condition have nothing to do with registration.
For the state to prove that the UBC law as broken, it has to prove that the transfer between these private parties took place after the law was enacted.